Boat Plans And Patterns | Delivery November 2012

Boat Plans And Patterns

Aurelius

?The end of the hurricane season is marked by the annual exodus to warmer sky. Boats of all kinds and sizes descent south. My son Chauncey jumped aboard "Aurelius", a Gerard Dijstra & Partners classic design for a quick 8 days delivery from Mamaroneck to St. Martin.

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 By luck a friend took this photo of Aurelius under the Brooklyn Bridge.

Over the 1500 miles passage, Captain Ken, Joey Waits and Chauncey + 2, encountered mostly light winds with the occasional squalls.

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 Captain Ken, Chauncey and Joey.

                                          

                                                                    
                                                  Saint Martin                                                     

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A little side story.

The small world of yachting, even at the top of the world. My son Chauncey first met Joey during the M/Y Began expedition to conquer the North East Passage. Joey was on a Ketch called Fiona. Both enterprises were successful in making the crossing in one season.

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Boat Plans Stitch And Glue | Britton Chance Jr 1940 2012

Boat Plans Stitch And Glue

The passing of Brit Chance, the gifted yacht designer saddened me.

A little side story.

Early in my career, in the 60s, I read in a French Magazine the word "genius" associated with Britton Chances design. I said to myself; I want to work for someone like that. Later ,while I was working for the French architect Andre Mauric on the 12 Meter challenge for the Americas Cup launched by Baron Bich, the "President" hired Britton Chance to design a trial horse. So, I met him during the building of "Chancegger" in Switzerland, where from time to time I got to go. Still later on, I approached him for a design job in his office in the US. A few months later I received my Green Card, sponsored by him and Olin and Roderick Stephens. This card arrived faster than expected and Brit was not quite ready to employ me. The possibility of working for Sparkman & Stephens was also there, but I did not wanted to work in New-York City.  A few days later, I was hired by Dick Carter and this is another story.

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Boat Trailer Plans Australia | Summer and spring cruising through 2012

Boat Trailer Plans Australia

Summer and spring cruising  2012

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Boat Plans Aluminium | Volvo Ocean Race 2012

Boat Plans Aluminium

Its over. Nine months, 39000 miles and one winner. The talented Franck Cammas and his crew aboard one of the Juan K. boats. I also have a few observations about this latest edition of the Volvo Ocean race.

Each one of the boats with the exception of Sanya won at least one Ocean leg, winning from a tactical decision and position, not necessarily from boat speed.
Inshore races, again with the exception of Sanya, each one of the boats won at least one race where tactics and decisions came into play. It seems to me that the Box Rule in effect does a pretty good job in the design of the boats and that where you go is still the deciding factor.
Breakage. There was material failure in various degrees for all of them. The construction of the boat can be reviewed to include modifications to the scantlings. Ought to be not too difficult with the amount of feed back and observations gathered over the past few months. Keep the performance high, the drama low.

Now comes the unfortunate changes for the next venue of the VOR. The new One Design Class.
From an independent yacht designer, any notion of a O.D class is heresy, unless it is your own of course. But it is also a blow to the competitive aspect of Yachting, between the shipyards, the equipment manufacturers, the media, the countries; an entire worldwide industry. That is too bad, this is a theme I touched upon on the previous Americas Cup post. But Volvo is Volvo and owns the production. My views are that the present class is a superb platform to build upon and with the creation of two divisions made of Protos and New boats the number of eight boats could be achieved without sending the thoroughbreds to the farm.

 

 

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Boden Boat Plans Australia | Winter work and refurbishment December 2012 May 2013

Boden Boat Plans Australia

Winter work and refurbishment (December 2012  May 2013)

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Boat Plans Aluminum | 545 3 Vendee Globe 2012

Boat Plans Aluminum

                        We are talking about miles over a 24 hour period in the Vendee Globe Race.

Besides the weather routing, wind and options in tactic, superficially I want to analyze the best of the Imoca 60s. Macif and Banque Populaire are the current leaders as they approach the Western side of Australia. The two boats are the latest VPLP/Verdier collaboration in design. Under present condition and for that matter nearly all the time, M and B-P. seem to have an advantage in speed over the rest of the fleet. On the Vendee Globe web site, I gather that M. is the lightest of them all, that both M. and B-P have rotating masts which I consider essential to make a substantial difference in performance. This can explain the small deficit of the close sistership Virpak-Paper who has a conventional standing mast and rigging configuration. From my point of view the drawback of the rotating mast is presented in the form of the fragile and cumbersome outriggers. They have been the cause of problems past and in present circumstances. I think there is a better solution as explained in one of the comment                                        

                                         

Now, as the three leaders remain in position as they go up the Atlantic, I regret the absence of Cheminees Poujoulat. I think the boat has potentials and probably would have shone in an upwind battle. I say that because analyzing the various keels as displayed by Tagland, C-P has a larger surface which could have made a difference against the three close sisterships mentioned above. We will not know for a while.

                                Cheminees Poujoulat. Juan K. Design                                                                      

 

                          
Virbac-Paper lost her keel.
One thing that surprised me in the last Volvo Race is apparently the absence of major problems associated with the pivoting keels. It seems that  keeping keels in place is still very much an issue with the current and recent Vendee Globe Racers. The fact that the keel is swinging from a single fore and aft bolt with fairing pieces is not easy to solve from an engineering point of view. Jean-Pierre Dick ended up sailing over 2000 miles without a keel. Amazing piece of seamanship associated with a lot of courage. I met J-P once at the Old Armchair sailors Bookstore here in Newport, we had a nice chat.

                                Macif, winner of the Vendee Globe 2012. VPLP/Verdier Design.

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Boat Plans Skiff | Vendee Globe 2012

Boat Plans Skiff

In a few days the Everest of Sailing is starting. Non stop round the world, no assistance aboard 60 boats-projectile handled by a single person. The following has been written September 17, 2010, and originally published by: httP://www.sailinganarchy.com The Open Class 60s has always been for me one of the most interesting sailing vessel ever conceived. In her scope, her goal, her pace along with the stamina of her single-handed Driver. So over the years, I have compiled a maximum of data, information and designs to create and expand with an on going R & D for the beast. The boat is designed with the Vendee Globe in mind. Therefore the total aspect of the design has to be considered for this Marathon at sea. Ergonomically, simplicity, functionability and speed.

The shape has a few pecularities. A "Potemkin" bow allows a fine water entry and the reverse curve of the bow gives a wide drier deck for a strong base to the permanent installation of the bowsprit. The rest of the boat is built on a chined platform, wide in beam and almost wider at the transom. The chine separates the water, breaks the wetted area downwind while optimizing the placement of water ballast for upwind stability and downwind trim. The flat Veed stern narrows the waterline for a less sticky transom while keeping the buttocks as straight and flat as possible.

The lines are carried towards the bow in a deep and sharp section to give some grip to the water when going upwind. The slight reverse curve given to the sheerline delays the incoming water and reduces the freeboard aft. The deck features the interesting double companionway, separated by a trench. First seen on a Mini Transat 6.5M. in 1991,this arrangement permits to centralize the lines coming from the mast and gives a cleaner side decks. I also needed in my case, to give a strong support to the boom vang/combination. The two entries offer protection to the helmsman and a better view when steering.

The twin outboard rudders, placed well to the sides are out of the wake exit and are perpendicular to the bottom angle. In case of hitting something, the rudders swing aft, thanks to a "fuse" line build into the system. The keel is designed to carry all of its lead into the shape of the bulb for maximium stability. The planform is designed to maximize the aspect ratio available with an optimized sweepback angle. But the most important part has to be the integrity and strength that have to be given to this heavily loaded pendulum keel. The curved dagger boards are placed as far as outboard as possible in order to take advantage of their higher aspect ratio to produce lift with increased stability and less leeway.

The Sail Plan represents an effort to place the mast as far aft as dictated by balancing the rig with the appendages. The column stability of the rotating mast is managed by a three-diamond wire systemm much preferred in my view to outriggers. The Main flat top is in line with what is the norm now. The large fore triangle is divided to accommodate four different distribution of the available sail area within the ten sails permitted. I would like to think that the overall design conveys a desire to achieve the best possibilities and straightforwardness with wherewithal.

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